Gear-grinding machine or the like.



w. F. WAGNER. GEAR GRINDING MACHINE OR THE LIKE.

APPLICATION FILED APR. 5, 1909.

Patented Aug. 9, 1910.

3 SHEETS-SHEET 1.

6. a Wwm W. P. WAGNER. GEAR GRINDING MACHINE OR THE LIKE.

' APPLICATION FILED Am. 5, 1909. 966,967. Patented Aug. 9, 1910.

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Ava/70R MT/VESSES 525. c Wfi/KW Patented Aug. 9, 1910.

3 BEEETB-SHEBT 3.

W. F. WAGNER. GEAR GRINDING MACHINE OR THE LIKE.

I APPLICATION FILED APR. 5, 1909. 966,967.

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W fi M UNITED STATES PATENT OFFICE.

WILLIAM F. WAGNER, OF DETROIT, MICHIGAN, ASSIGNOR TO STANDARD GEAR GRIND- ING- GOMIIE'AINY, OF DETROIT, MICHIGAN, A CORPORATION.

GEAR-GRINDING MACHINE OR THE LIKE.

Application filed April 5, 1909. Serial No. 488,104.

Specification of Letters Patent.

Patented Aug. 9, 1910.

To all whom it may concern:

Be it known that I, WILLIAM F. WAGNER,

a citizen of the United States, and a resident of Detroit, in the county of Wayne and State, of Michigan, have invented a certain new on, which form a art of this specification.

My invention re ates to grinding machines of the class particularly applicable for the grinding of ears or other objects having irregular sur aces to be ronnd,-but may be used in any connection or which it may be adapted. i

The object of my mechanism which is automatically operative during a running of the machine to suect ssively trim the grinding medium after at each grinding operation to maintain the op moving the trimming mechanism and wor relative to the grinding medium to compensate for the material removed from such medium by the grinding and trimming oprations. I

' The operation, constructionand arran einent of the'parts of the invention are. fu ly described inthe accompanying drawings, and while the invention 1n its broad aspect may be embodied in numerous forms a preferred form of the same is illustrated in the accompanying drawings, in which,

Figure 1 is a sideelevation of the machine with portions broken-away. Fig. 2 is a plan iriew ofthe same with portions broken away.

Fig 3 is a verticalcross-section on the line" a: a: in F' 1. Fig. 4 is an elevation of the front en of the machine with portions broken away. Fig. 5 is an enlarged sect-ion on the line y 3 in Fig. 1, and Fig. 6 is an enlarged front elevation of a portion of the mechanism. for trimming the grinding-wheel ed e..

eferring to the drawings, 1. designates the machine frame, which; is formed with invention is the pro- -v1s1on of simple, efiicient and lmproved moved by a-beltshiftin eye 21 into en age the rear and front elevated portions 2 and 3, respectively. In the top of the frame portion 2, near one side thereof is provided a pulley 10 carried b an overhead line-shaft, the belt being gui ed in its course by idler pulle'ysll, 11 carried by standards 12, 12

rising from the carriage 5.

The requisite forward and backward movementsare imparted to the carriage 5 by any suitable reversing mechanism. A simple means of performing this 'consists in providing the bottom-of the carriage 5 with a longitudinally-extending rack 13 with which a pinion 14 on the shaft. 15 meshes. theshaft 15 has one end projected beyond its bearing in the frame side and carries aulway 1 inwhich a carriage 5 is mounted for v pulley on the shaft therewith with a drive ley' 16, which is driven from a pulley 1 on .a shaft, 18 by abelt 19. The shaft 18 is shown as beingdisposed at one side of the frame 1, longitudinally thereof, and has reverse rotation successively imparted thereto'from a continuouslyrevolving linegr other shaft (not shown) by. the straight aind crossed belts 20, 20, which are alternately ment with one or the ot er of the fixe pulleys 22, 22 on the shaft l8 and the intermediate loose pulley 23 thereon, as is-common in planing machines or the like. The shifter-' eye "21 .is automatically shifted first in one direction and then another due to lugs'24 and 25, which are carried-by the carriage 5 at one side thereof, striking a registering lug 26 on such eye when the carriage is near the limits of its forward and backward movements, respectively. t p The mechanism employed to trim the grinding-wheel is carried by a. table 27, which is mounted for movements longitudinally of the frame in a guide-way 28'pro- V vided in the top of the frame part at the V from the sides of such table is a shaft 30,

carrying a pulley 31 at oneend, which is driven by a belt 32 from any suitable source of. power, or in any other suitable manner.

Disposed in advance of the shaft 30 in register with the reciprocat-ory movements of the grinding-wheel 6 in substantially the plane of movement of its axis is a horizontal forwardly projecting finger 33, the forward end of which carries a diamond or other suitable trimmer medium for acting on the peripheral edge a of the grinding-wheel to trim the same when at the limit of its rearward movements, while the rear end thereof projects into a cam-groove formed pe ripherally in, an enlarged part of the shaft 30, as shown, whereby a rapid lateral reciprocatiori is imparted to such finger when the shaft 30 .is rotated. The finger 33 is shown as being carried by a forked support 35, see Fig. 6, the terminal ends of the arms of which project horizontally and work in guides 36, 36 rising from the table 27 topermit the lateral reciprocatory movements of the finger 33.

Spanning the table 27 to the rear of the shaft30 with its ends fixed to the top of the frame part 2 at the sides of the table is a bar 37, the central top portion of which is longitudinally grooved, as at 38, to provide a guide-way for blocks 39, 39 to work in. Projecting forwardly from each block 39 is an arm 40 which engages with a registering boxing orsleeve 41, mounted loosely on the shaft 30 at one side of the cam-groove 34,

' in a manner to permit the arm to have free movements transversely of the shaft relative to such sleeve and to cause them to move togetherlongitudinally of the 'shaft. The meansshown for accomplishing this consists in roviding the arm 40 with a longitudina slot 42 (Fig. 1) for receiving a grooved portion of the boxing or sleeve 41.

Mounted in a socket or opening on the top of each boxing or sleeve 41 and secured in adjusted position therein by a set-screw 43 is a horizontally-disposed finger 44, which has its forward end projected at the contiguous side of the path of reciprocation of -t-he grinding-wheel and carrying a transversely-disposed trimmer 'member 45, the inner end of which is faced with a diamond or other suitabletrimmer means and adapted to act on the contiguous side working surface b of the grinding-wheel to trim' the same when such wheel is substantially at the limit of its rearward movement. The members 45 are shown in the present instance as comprising screws, which are threaded through the fingers 44. The blocks 39, 39 are caused to have relative contracting movements within the groove 38 due to the action thereon of the coiled contraction-springs 46, 46, the end thrusts of which are against the end walls of the groove and the outer'ends of the 'blocks.

The trimming movements ofthe members 1 45 are controlled by the movement of a form 4'1 between the inner ends of the blocks 39, said form being removably carried at the rear end of an arm 48, which projects rearwardly from the end of the bearing arm 8 so that it moves forward and backward with the grinding-wheel. As the'nose of the form 47, which is fashioned to conform exactly to the size and shape of the surface to be ground, enters between the inner ends of the blocks 39, such blocks are moved as the coacting surfaces of the form may require or permit and like movements are communicated to the trimmer-members 45 due to the parallel movements of said members and blocks, thus causing the working surfaces b of the grinding-wheel, which enter and pass between the trimmer members 45, 45 simultaneously with the entering and passing of the nose of the form between the blocks, to be trimmed into a duplicate shape to that of the form.

The provision of a form which corresponds exactly in shape and size to the surface to be ground is a very important feature as it is only necessary to furnish the user of the machine with the form of a tooth or other surface to be ground, and he can then either place such form on the end of the arm 48, if adapted for such purpose, or can make the necessary form 47 of exact shape and size as the sample.

The index mechanism which carries and controls the movements of the gear or other work 7, comprises a mandrel 49, which is mounted in a block'50 and carries the work 7 at its inner end and a worm-wheel 51 at its outer end. The block 50 is mounted for vertical adjustment in a guide-way 52 of the frame part 3 and is adjusted as hereinafter described. Meshing with the wormwheel 51 is a worm53, the shaft 54 of which is journaled in bearings 55, 55, carried by theblock 50, and carries a ratchet-wheel 56 at one end thereof at the side of the frame. This ratchet-wheel has intermittent rotation imparted thereto by the reciprocation of a ,rod 57, which has an end bent and working through a slot 58 in a lever 59, which lever is forked to adapt it to straddle the ratchetwheel and loosely fulcrum on the shaft 54 her side of one frame side, and hasits rear end provided with a roller 61 for working in a longitudinal slot 62 in the lowerend of a lever 63., which is fulcrumed as at 64. The upper end of the lever is normally disposed in position to be engaged and rocked by a boss 65, projecting down from the bottom of the carriage 5, when such carriage is near the limit of its rearward movement. The lever 63 is normally held in one position of its movement, with its upper end forward, due to the action thereon of a weight 66, which is carried by an arm 67 rojecting forwardly from the lever at its ulcrum point. The throw of the lever 63 is regulated by means of a stop-screw 68, which is threaded through a bracket 69 at the rear end of the frame in position to coact with the lower end of the lever 63 on its rearward movement.

I 70 designates a shaft, which-is "disposed within the frame 1 longitudinally thereof with its ends journaled in bearings 71, 71, and carries the bevel-gears 72 and 73 at its forward and rear ends, respectively. The forward gear 72 meshes with a companion gear 74, which is carried at the lower end of a hollow vertical shaft 75 that is journaled in bearing-arms 76, 76, and has the lower end of a stem or-rod 77 threaded therein, the upper end of said rod being fixed to the under. side of the block 50, thus adapting a turning of the hollow-shaft 7 5' to effect a vertical adjustment of said blocks A turning of the shaft 70 also communicates a forward. adjusting movement to the table 27, carrying thetrimming mechanism, through the medium of the arm 78, which projects downwardly from such table and has its lower' end provided with a sleeve 79 through which a portion 80 of the shaft'70 is threaded, as shown in Fig. 1. The shaft 70 is driven by a countershaft 81 through the medium of a bevel-gear 82 in mesh with the gear 73, said shaft 81 being journaled in a pedestal-bearing 83 and in one frame 'ide, see Figs. 1 and 3, and carrying a rat et-wheel 84, with which a dog 85. which is carried by a lever 86, engages. The lever 86 has its lower end loosely fulcrumed to the shaft 81 and its 'upporend slotted, as at 87, for a pin 88, which is carried by a boss 89 on the bottom of tlkacarriage 5, to work in, thus causing the lever to move positlvely with the carrlage 5 in both directions of its movement. The gears and threads of thisadjusting mechanism are I so arranged and proportioned that thetable 27 is moved forwardly and the block 50 moved-upwardly a desired distance atleachi forward movement ofth'e carriage 5 to compensate for the wear ofthe grinding-wheel.

r The operation of mymachine is as fol-' lows:--'-The work .7' to be ground being...

placed on themandrel 49 'anda-form of the required shape and size secured to the end of the arm. 48, the 'reversing mechanism is set in motion and a forward and backward movement thereby communicated to the carriage 5, thus moving the across the face of the w'orr to grind the same. When the carriage 5 is near the limit of its rearward movements'the form 47 and edge of the grinding-wheel simultaneously enter between the blocks 39, 39 andthe trimmer members 45, 45, respectively, the form acting on said blocks to move the same outwardly as the shape of the form may require, and the trimmer-members 45 moving withsuch blocks to trim the surfaces 6 of 'thegrinding-wheel to conform to the form movement of the carriage 5 the work 7 is rotated the distance of one tooth or suiticiently to move the next surface to be ground into register with the grinding-wheel due to the boss striking and efi'ecting anoscillation of the lever 63, which in turn communicates a slight rotation to the mandrel 49 rinding wheel through the medium-of the rod 57, lever 59,

dog 60, ratchet-wheel 56, worm-shaft 54 and worm wheel 51. The oscillation imparted to the lever 86 on each forward stroke of the.

carriage effects a partial rotation of the shaft 81, due to the enga ement of the dog 85 with the ratchebwhee 84, and a consequent partial, rotation to the shaft 70 through the medium of the bevel-gears 73 and 82 The rotation of the shaft 70 causes a Very. slight forward'adjustment ofthe table 27 and associated trimmer part-s due to the turningof the threaded portion 80 of said shaft withinthe sleeve 79- carried by the table-arm 78, thus compensating for the material removed from the grinding-Wheel during the previous grinding and trimming operations. The rotation of the shaft 70 also effects a slight raising of the block 50 to raise the work relative to the grindingwheel to cause the wheel to take the same bite at each operation, due to the bevel-gears 72 and 74 communicating rotation to the hollow shaft 7 5 in which the rod 77, which projects downwardly from the block 50, is threaded. It is thusapparent that during a running of the machine both the trimming 'mechanism and the work are automatically adjusted relative to the grinding-wheel to cause aiuniform trimmin of the grindingwheel and grindin of 't 1e successive surfaces ,or grooves 0' the work. If it isdesired for any causeto work the grindingwheel forward and backward. without at the same timeeifecting an adjustment of the arrangement of the parts except in so far as such limitations are specified in the claims.

Having thus described my invention, what I claim as new and desire to secure by Let- 'ters Patent, is,-

1; In a machine'of the class described, the combination of a horizontal reciprocatory grinding-wheel, and mechanism disposed in substantially the plane of movement of the axis of such wheel and operative to trim the working surface of the wheel when at the limit of its rearward movement.

2. In a machine of the class described, the combination with a grinding wheel, of a trimming mechanism, means for imparting relative to and fro movements to said wheel and mechanism, said mechanism having trimmer members movable toward and away from each other in parallelism, and means. acting on such mechanism at a predetermined point in the relative movements of such wheel and mechanism to guide the trimming movements of such members.

3. In a machine of the class described, the combination of a grinding wheel, a trimming mechanism for such wheel, means for imparting relative reciprocatory movements to said wheel and mechanism, said mechanism having trimming members operative to have opposed movements in parallelism to simultaneously trim the opposed -working surfaces of the wheel, and a form movable to act on such members at a predetermined point in'tl1e. relative movements of such wheel and mechanism to guide their trim- I ming movements.

. relative movements. 1

4. In a machine of theclass described, the

combination of a grinding-wheel and a trlmmer mechanism capable of relative re-,

'ciprocatory movements, said trimmer mechanism comprising two parallel partscarrymg inwardly prO ectmg trimmer means at oneof their ends for passing on opposite sides of the working surface of the grinding wheel, and a form adapted 'to act on said parallel parts to impart parallel trimming movements to said trimmer means at a predetermined point in the relative movements of the wheel and mechanism'and means-for causingsaid wheel and mechanism to have 5. In a machine of the class described, the

combination of a reciprocatory grindingming movements thereto at a predetermined point in the movement of the wheel.

' 6. In a machine of the class described, the combination of a reciprocatory grindingwheel, a trimmer mechanism associated with such wheel and havingopposed reciprocatory trimmer parts movable in parallelism toward and from each other to trinr the working-surface of the wheel, and a form movablewvith the wheel and adapted to act on the trimmer parts to impart predetermined trimmingmovements thereto at a predetermined point in the movement of the wheel.

7 In a machine of the class described, the combination of a reciprocatory grinding- Wheel, a trimmer mechanism comprising a set of reciprocatoryblocks mounted forrelat-ive movements toward and from each other, arms projecting from each of said blocks, and trimmer members carried by said arms in position to act on opposite sides of' the wheel to trim the same, and a form movable with the wheel and adapted to act on said blocks at a predetermined point in the movement of the wheel to impart opposed lateral -reciprocatory movement-s to said arms and trimmer members in parallelism to trim the wheel.

8. In a machine of the class described, the combination of a grindin -wheel, a trimmer member associated with t 1e wheel for trimming the edge thereof, and a shaft having a cam-groove therein which acts on the trimmer member to im art rapid lateral reciprocation thereto w en the shaft is rotated.

9. In a machine of the class described, the combination of a reciprocatory grindingwheel, a shaft disposed near one endof the reciprocatory movements of such wheel,- said shaft having a cam-groove therein, and a trimmer member movable laterally of the wheel and having one end adapted to act on the edge of the wheel to trim the same and its other end workin in said cam groove to cause said fin er to be rapidly reciprocated across the ace. of the wheel when the to be ground and adapted to cooperate with said trimmer parts to; impart trimming movements thereto to intermittently trim the working surface of the grinding-wheel to conform to the surface .to be ground and means for imparting relative movements to said wheel and mechanism.

11. In a machine of the class described, the combination of a grinding-wheel, a trimmer mechanism adjustable relative to said grinding-wheel to compensate for Wear and having opposedreciprocatory trimmer parts movablein parallelism, means for moving said trimmer parts in parallelism to trim the working surface of the wheel, and means combination of a reciprocatory carriage, a grinding-wheel carried thereby, a trimmer mechanism having a set of movable trimmer parts between which the edge of the wheel intermittently passes as it reciprocates, and a templet fixed relative to the carriage and adapted, at a predetermined pointin the movement of said carriage, to cooperate with said trimmer parts to impart trimming movements thereto.

14. In a machine of the class described, the combination of a reciprocatory carriage, a grindingwheel carried by the carriage, a

trimmer mechanism having a set of spaced trimmer parts, an arm projecting from such carriage, and a form carriedby such arm and adapted to cooperate with such trimmer parts to impart trimming movements thereto to intermittently trim'the Working sur face of the grinding-wheel to conform to the surface to be ground.

15'. In a machine of the class described, the combination of a grinding-member, mechanism operative to trim the working surface of such member, means for imparting relative movements to said member and mechanism, and a templet conformingexactly to the surface to be ground and adapted to cooperate with said mechanism to intermittently trim the working surface of said member to conform to the surface to be ground.

16. In a machine of the class described, the combination of a grinding-wheel, a reciprocatory mount therefor, mechanism adapted to act on the wheel to trim the same at a predetermined point in the movement of the mount, and means automatically actuated by the movement of the mount to effect a movement of the trimmer mechanism toward the wheel.

17. In a machine of the class described,

the coi'nbination of the grinding-wheel, a reciprocatory carriage therefor,-a reclproca- 13. In a machine of the class described, the

tory table, mechanism carried by said table for trimming the wheel, and means actuated by a movement of the carriage for moving said table to advance the trimmer mechanism relative to'the wheel.

18. In a machine, of the class described, the combination of a grinding-Wheel,a reciprocatory carriage therefor, a table movable longitudinally of the direction of movement of the carriage, a trimmer mechanism carried by such table, means actuated by a movement of the carriage for acting on the trimmer mechanism to impart trimming movements thereto, and means movable by the carriage for intermittently advancing said table.

19. In a machine of the class described, the combination of a grinding-wheel,a reciprocatory carriage for the same, a pair of laterally reciprocatory members capable of movements in parallelism, a finger adjustably projecting from each of said members and movable therewith, means carried by said fingers for acting on opposed surfaces of the wheel to trim the same, and a form movablewith the carriage and adapted to act on said laterally reciprocatory members at a predetermined point in a movement of the carriage whereby to impart predetermined trimming movements to said trimmer means.

20. In a machine of the. class described,

the combination of a grinding-wheel,a reciprocatory carriage for the same, a shaft disposed transversely of the wheel at one end of its reciprocatory movement, said shaft having a cam-groove therein, sleeves movable longitudinally on said shaft, a pair of members carried by said sleeves and capable of opposed reciprocatory movements in parallelism, trimmer means adjustably carried by said members for acting on opposed sides of the grinding-wheel, a trimmer member adapted to act on the edge of the Wheel to trim the same and having rapid reciprocatory movements imparted thereto laterally of the wheel by said cam-groove, and means carried by the carriage and adapted to act on said pair of members to move the same to communicate predetermined trimming movements to the trimmer means at a predetermined point in the movement of the wheel. p

21. In a machine of the class described, the combination of a grinding-wheel,a reciprocatory carriage therefor, a table, a trimmer mechanism carried by such table, a worm coacting with a part 011 said table and adapted to have an adjustment thereof when turned, and mechanism actuated by the" a part projecting therefrom, a Wheel-trimming mechanism carried by the table, a shaft having a part threaded through said table part whereby a turning of the shaft eflects a movement of said table, a lever movable by the movement of the carriage for impfarting intermittent rotation to said sha t.

In testimony whereof-, I have hereunto slgned my name to this specification 1n the 10 presence of two subscribing witnesses.

WILLIAM F. WAGNER.

YVitnessesi C. W. OWEN, HAZEL -B. I-IIETT. 

